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Thread: [RESOLVED] defining swap image width height in script

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  1. #1
    Join Date
    Dec 2006
    Location
    San Diego, CA
    Posts
    13

    resolved [RESOLVED] defining swap image width height in script

    I am using the following javascript for a swap image restore on a navigation button:


    Code:
    <!--
    function MM_preloadImages() { //v3.0
      var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
        var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
        if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
    }
    
    function MM_swapImgRestore() { //v3.0
      var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
    }
    
    function MM_findObj(n, d) { //v4.01
      var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
        d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
      if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
      for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
      if(!x && d.getElementById) x=d.getElementById(n); return x;
    }
    
    function MM_swapImage() { //v3.0
      var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
       if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
    }
    
    ------body---------
    
    <img src="images/left_arrow.png" name="back" width="21" height="82" id="back" border="0" 
    onmouseover="MM_swapImage('back','','images/left_arrow_over.png',1)" onmouseout="MM_swapImgRestore()" />
    Unfortunately, due to a quirk in IE 6 the transparencies in my PNG buttons show as gray. I found a nice correction using an alphaimageloader script from here, but it requires defining a width and height attribute for both the original image AND the image that will be swapped.

    I'm not really a javascript expert and I'm not readily seeing where to define these attributes in the MM_swapImage() function above for the swap target image. Any advice would be greatly appreciated. thx.
    Last edited by jepler; 08-08-2007 at 08:39 PM.
    James Epler
    San Diego, CA
    http://mytechmusings.blogspot.com

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